JPH02305569A - Artificial root of tooth - Google Patents
Artificial root of toothInfo
- Publication number
- JPH02305569A JPH02305569A JP1124527A JP12452789A JPH02305569A JP H02305569 A JPH02305569 A JP H02305569A JP 1124527 A JP1124527 A JP 1124527A JP 12452789 A JP12452789 A JP 12452789A JP H02305569 A JPH02305569 A JP H02305569A
- Authority
- JP
- Japan
- Prior art keywords
- living body
- tooth root
- artificial tooth
- pores
- tooth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000011148 porous material Substances 0.000 claims abstract description 41
- 230000000975 bioactive effect Effects 0.000 claims description 15
- 239000011162 core material Substances 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 5
- 239000011521 glass Substances 0.000 abstract description 5
- 229910052588 hydroxylapatite Inorganic materials 0.000 abstract description 5
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000010936 titanium Substances 0.000 abstract description 3
- 229910052719 titanium Inorganic materials 0.000 abstract description 3
- 239000001506 calcium phosphate Substances 0.000 abstract description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 abstract description 2
- 229940078499 tricalcium phosphate Drugs 0.000 abstract description 2
- 229910000391 tricalcium phosphate Inorganic materials 0.000 abstract description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 abstract description 2
- 239000011149 active material Substances 0.000 abstract 4
- 229910000684 Cobalt-chrome Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 230000001055 chewing effect Effects 0.000 abstract 1
- 239000010952 cobalt-chrome Substances 0.000 abstract 1
- 239000007943 implant Substances 0.000 abstract 1
- 210000001519 tissue Anatomy 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 210000002379 periodontal ligament Anatomy 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000011164 ossification Effects 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 2
- 208000006386 Bone Resorption Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 239000005313 bioactive glass Substances 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000024279 bone resorption Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000005548 dental material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 hydroxyapatite Chemical compound 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000018984 mastication Effects 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Dental Prosthetics (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、生体親和性に優れ、且つ天然歯根とほぼ同等
な機能を有する人工歯根に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an artificial tooth root that has excellent biocompatibility and functions almost equivalent to a natural tooth root.
〈従来の技術〉
従来、人工材料の発達にともない生体用の材料が、多岐
に渡って開発されている。歯科用材料も同様であって、
人工歯根用材料として１例えばコバルト−クロム合金、
チタン等の金属材料、ヒドロキシアパタイト、アルミナ
、結晶化ガラス、炭素等のセラミックス材料を用いるこ
とが知られている。前記人工歯根の開発にあたっては、
歯根を顎骨に強固に固定することが重要である。そこで
従来例えば、金属を用いた人工歯根（特開昭５３−２８
９９７号公報）、ヒドロキシアパタイト等のセラミック
スを用いた人工歯根（特開昭６０−１３５０４２号公報
）、アルミナを用いた人工歯根（歯科ジャーナルＶＯ１
，２５Ｎ１３ Ｍａｙ １９８７ ｐ、６３５〜６４６
） 、結晶化ガラスを用いた人工歯根（特開昭５７−７
５６４６号公報）が提案されている。<Conventional Technology> With the development of artificial materials, a wide variety of biological materials have been developed. The same goes for dental materials,
Materials for artificial tooth roots: 1. For example, cobalt-chromium alloy,
It is known to use metal materials such as titanium, and ceramic materials such as hydroxyapatite, alumina, crystallized glass, and carbon. In developing the artificial tooth root,
It is important to firmly anchor the tooth root to the jawbone. Conventionally, for example, artificial tooth roots using metal (Japanese Patent Laid-Open No. 53-28
No. 997), artificial tooth roots using ceramics such as hydroxyapatite (Japanese Unexamined Patent Publication No. 135042/1982), artificial tooth roots using alumina (Dental Journal VO1)
, 25N13 May 1987 p, 635-646
), Artificial tooth root using crystallized glass (Japanese Patent Application Laid-open No. 57-7
No. 5646) has been proposed.
しかしながら、骨と直接結合することの無い金属材料又
はアルミナを人工歯根として用いる場合には、該人工歯
根を、アンカー効果が期待できる形状として、顎骨に機
械的に固定するために、顎骨に対して異常な負荷が掛か
り、骨の吸収が生じる恐れがあり、長期にわたる使用に
耐えられないという欠点がある。また骨と直接結合する
と考えられているヒドロキシアパタイト又は結晶化ガラ
スを、人工歯根として用いる場合には、咬合時の顎骨に
対する衝撃を防止するために、緩衝材を人工歯根に付与
する必要があり、従って、劣化した前記緩衝材を頻繁に
交換しなければならないという欠点がある。However, when using a metal material or alumina that does not directly bond with bone as an artificial tooth root, the artificial tooth root should be mechanically fixed to the jawbone in a shape that can be expected to have an anchoring effect. It has the disadvantage that it is not able to withstand long-term use because it is subject to an abnormal load and may cause bone resorption. Furthermore, when hydroxyapatite or crystallized glass, which is thought to bond directly with bone, is used as an artificial tooth root, it is necessary to add a cushioning material to the artificial tooth root to prevent impact on the jawbone during occlusion. Therefore, there is a drawback that the deteriorated cushioning material must be replaced frequently.
〈発明を解決するための手段〉
本発明の目的は、インブラントすることによって、天然
歯根と同等な咀噌機能を発揮することができる人工歯根
を提供することにある。<Means for Solving the Invention> An object of the present invention is to provide an artificial tooth root that can exhibit the same masticatory function as a natural tooth root by being implanted.
本発明の別の目的は、生体親和性に優れ、しかも顎骨内
に長期にわたり安定的に存在させることが可能な人工歯
根を提供することにある。Another object of the present invention is to provide an artificial tooth root that has excellent biocompatibility and can remain stably in the jawbone for a long period of time.
本発明の更に別の目的は、インブラント後のメンテナン
スが容易である人工歯根を提供することにある。Yet another object of the present invention is to provide an artificial tooth root that is easy to maintain after implantation.
〈課題を解決するための手段〉
本発明によれば、歯の上部構造を挿入固定するための穴
を有する芯材と、人工歯根の内側方向に向かって気孔を
有し、且つ顎骨と接するように配置した生体不活性材料
と、前記気孔内部に、直接顎骨と接しないように配置し
た生体活性材料とを備えることを特徴とする人工歯根が
提供される。<Means for Solving the Problems> According to the present invention, a core material having a hole for inserting and fixing the upper structure of the tooth, and a core material having pores toward the inside of the artificial tooth root and being in contact with the jawbone. An artificial tooth root is provided, comprising: a bioinert material disposed within the pore; and a bioactive material disposed within the pore so as not to be in direct contact with the jawbone.
ここで前記歯の上部構造とは、人工歯根の上部に設置す
るものであって、例えばクラウン及びポスト等が挙げら
れる。Here, the tooth superstructure is something that is installed above the artificial tooth root, and includes, for example, a crown and a post.
また本発明によれば、前記気孔表面部の径が１〜５０μ
ｍ及び／又は３０ｏ〜１０００μｍである前記人工歯根
が提供される。Further, according to the present invention, the diameter of the pore surface portion is 1 to 50 μm.
The artificial tooth root is provided with a diameter of m and/or 30o to 1000μm.
〈実施例〉
以下本発明を図を参照して実施例により更に詳細に説明
するが１本発明はこれに限定されるものではない。<Examples> The present invention will be described in more detail below by way of examples with reference to the drawings, but the present invention is not limited thereto.
第１図は、本発明の人工歯根１の一実施例を示す概略斜
視図であって、人工歯根１の中心部には、歯の上部構造
を挿入固定するための穴２Ａを有する芯材２が設けられ
ている。該芯材２を構成する材料は、特に限定されるも
のではないが、例えばチタン、コバルト−クロム合金等
の金属材料等を好ましく挙げることができ、また芯材２
に設けられる穴２ａの大きさは、歯の上部構造を挿入固
定できる大きさであれば良く、螺子切り等の加工を施す
こともできる。FIG. 1 is a schematic perspective view showing an embodiment of the artificial tooth root 1 of the present invention, in which a core member 2 having a hole 2A for inserting and fixing the upper structure of the tooth is provided at the center of the artificial tooth root 1. is provided. The material constituting the core material 2 is not particularly limited, but preferably includes metal materials such as titanium and cobalt-chromium alloy.
The hole 2a provided in the hole 2a may have a size that allows the upper structure of the tooth to be inserted and fixed therein, and may be processed by thread cutting or the like.
該芯材２の外側周囲には、芯材２を被うように生体活性
材料３が設けられる。該生体活性材料３は、生体親和性
を有し、且つ人工歯根としての強度を有する材料であれ
ば良く、例えばヒドロキシアパタイト、燐酸三カルシウ
ム、生体活性ガラス、結晶化ガラス及びこれらの混合物
等からなる群より選択されるセラミックス材料等を用い
ることができる。A bioactive material 3 is provided around the outside of the core material 2 so as to cover the core material 2 . The bioactive material 3 may be any material as long as it has biocompatibility and strength as an artificial tooth root, such as hydroxyapatite, tricalcium phosphate, bioactive glass, crystallized glass, and mixtures thereof. Ceramic materials etc. selected from the group can be used.
更に該生体活性材料３の外側周囲には、顎骨と直接接す
る生体不活性材料４が、前記生体活性材料３に連通ずる
複数の気孔（第２，３及び４図に示す）を有するように
配置される。生体不活性材料４としては、骨と直接結合
することの無い、例えばアルミナ、ジルコニア、炭素等
のセラッミク人材料等を好ましく用いることができる。Further, around the outside of the bioactive material 3, a bioinert material 4 in direct contact with the jawbone is arranged so as to have a plurality of pores (shown in FIGS. 2, 3, and 4) communicating with the bioactive material 3. be done. As the bioinert material 4, ceramic materials such as alumina, zirconia, carbon, etc., which do not directly bond with bones, can be preferably used.
次に第２ａ及び２ｂ図を参照して、前記気孔と生体活性
材料及び生体不活性材料との関係を説明する。Next, the relationship between the pores and the bioactive material and bioinert material will be explained with reference to FIGS. 2a and 2b.
第２ａ図は、第１図に示す人工歯根の一部拡大断面図で
あり、第２ｂ図は第１図に示す人工歯根の一部拡大平面
図であって、生体活性材料３の外側に気孔表面の径が、
１〜５０ＪＬｍ及び／又は３００〜１０００μｍである
気孔を有する生体不活性材料４が付与される。該気孔の
形成方法は、加熱時に消失する樹脂又は熱分解が可能な
ナフタリン等の化合物を、生体不活性材料４を構成する
暦を成形する際に添加し、加熱焼成する方法等により形
成することができる。この際気孔の形成方法は、前記範
囲の径を有する気孔が形成されれば特に限定されるもの
ではない。前記方法により設けられる気孔５は、人工歯
根の外側表面を多孔質とし、生体活性材料３と、外部、
即ち顎骨とを連通させるものであって、生体活性材料３
と顎骨とを直接接しないように気孔５を有する生体不活
性材料４が配置される。2a is a partially enlarged sectional view of the artificial tooth root shown in FIG. 1, and FIG. 2b is a partially enlarged plan view of the artificial tooth root shown in FIG. The diameter of the surface is
A bioinert material 4 is provided with pores that are between 1 and 50 JLm and/or between 300 and 1000 μm. The pores may be formed by adding a resin that disappears when heated or a compound such as naphthalene that can be thermally decomposed when molding the calendar constituting the bioinert material 4, and heating and baking. I can do it. At this time, the method for forming the pores is not particularly limited as long as pores having a diameter within the above range are formed. The pores 5 provided by the method make the outer surface of the artificial tooth root porous, and the bioactive material 3 and the outer surface of the artificial tooth root are porous.
That is, it communicates with the jawbone, and the bioactive material 3
A bioinert material 4 having pores 5 is arranged so as not to directly contact the jawbone.
本発明の人工歯根では、顎骨と接する面に多孔質層を形
成する気孔５を有するため、インブラントすることによ
り気孔５内に繊維質組織が侵入し、また気孔５内部に生
体活性材料３が存在するので、気孔５内に骨化が生じセ
メント質組織を形成すること力でできる。従って、繊維
質組織と、セメント質組織とが形成された気孔５は、天
然歯根における歯根膜とほぼ同等な機構を有するように
顎骨内に保持させることができる。前記気孔５の表面部
の径、即ち顎骨と接する気孔５の入口の径は、前述のと
おり、１〜５０μｍ及び／又は３００〜１０００μｍの
範囲であることが好ましく、特に５〜３０μｍであるの
が好ましい。この際径の大きさが前記範囲外の場合には
、本発明の人工歯根をインブラントした際に、気孔５内
に繊維質組織が侵入しない恐れがあり、気孔５の連通部
に骨化が生じ、天然歯根と同様な緩衝作用及び強度が得
られないので好ましくない。また前記気孔５表面部の径
が前記範囲内の場合における気孔５内部の径は、天然歯
根の歯根膜と同様な強度を有するようにセメント質組織
を形成させるために５Ｑμｍより大きく、３００μｍ未
満の範囲であるのが好ましい。Since the artificial tooth root of the present invention has pores 5 forming a porous layer on the surface in contact with the jawbone, fibrous tissue invades into the pores 5 by implantation, and the bioactive material 3 enters the inside of the pores 5. Due to the presence of pores, ossification occurs within the pores 5 to form cementum tissue. Therefore, the pores 5 in which the fibrous tissue and the cementum tissue are formed can be held in the jawbone so as to have a mechanism substantially equivalent to that of the periodontal ligament in a natural tooth root. As mentioned above, the diameter of the surface portion of the pore 5, that is, the diameter of the entrance of the pore 5 in contact with the jawbone, is preferably in the range of 1 to 50 μm and/or 300 to 1000 μm, particularly 5 to 30 μm. preferable. At this time, if the diameter is outside the above range, when the artificial tooth root of the present invention is implanted, there is a risk that the fibrous tissue will not enter into the pores 5, and ossification will occur in the communication part of the pores 5. This is undesirable because it does not provide the same cushioning effect and strength as natural tooth roots. In addition, when the diameter of the surface of the pore 5 is within the above range, the internal diameter of the pore 5 is larger than 5Qμm and less than 300μm in order to form a cementum tissue having the same strength as the periodontal ligament of a natural tooth root. Preferably, the range is within the range.
また前記気孔を有する生体不活性材料層は、連通気孔を
有する連続層に限定されるものではなく、第３ａ図に示
すとおり、球状の生体不活性材料４Ａを焼結等により設
けたものであっても良い。球状の生体不活性材料４Ａを
用いた場合の人工歯根の一部拡大平面図は、第３ｂ図に
示すとおりであり、３Ａは、生体活性材料を示し、生体
不活性材料４Ａを球状とし、複数層とすることもできる
。Furthermore, the bioinert material layer having pores is not limited to a continuous layer having communicating pores, but may be a spherical bioinert material 4A formed by sintering or the like, as shown in FIG. 3a. It's okay. A partially enlarged plan view of the artificial tooth root when the spherical bioinert material 4A is used is as shown in FIG. 3b, where 3A indicates the bioactive material, the bioinert material 4A is spherical, It can also be a layer.
更に別の実施例として、芯材２Ｂの外側に生体活性材料
ではなく、生体不活性材料４Ｂを設けた人工歯根の一部
拡大断面図を第４ａ図に、一部拡大平面図を第４ｂ図に
示す。前記生体不活性材料４Ｂは、芯材２Ｂの外側周囲
に設けられ、且つ人工歯根の外側、即ち顎骨に直接接す
る側に、多孔質を形成するための、気孔５Ｂとなる凹部
が形成されており、該気孔５Ｂは人工歯根の内側方向に
向かって設けられている。気孔５Ｂ表面部の径及び内部
の径は、前記第２ａ及び第２ｂ図に示す人工歯根の気孔
と同様な範囲であるのが好ましい。As yet another example, FIG. 4a is a partially enlarged sectional view of an artificial tooth root in which a bioinert material 4B is provided instead of a bioactive material on the outside of the core material 2B, and FIG. 4b is a partially enlarged plan view. Shown below. The bioinert material 4B is provided around the outer side of the core material 2B, and has recesses that become pores 5B for forming porosity on the outside of the artificial tooth root, that is, on the side directly in contact with the jawbone. , the pores 5B are provided toward the inside of the artificial tooth root. The diameter of the surface portion of the pore 5B and the internal diameter are preferably in the same range as the pores of the artificial tooth root shown in FIGS. 2a and 2b.
前記凹部、即ち気孔５Ｂの内面には、生体活性材料４Ｂ
が、直接顎骨に接しないように設けられているので、前
記第２ａ図及び第３ａ図に示す実施例と同様に１人工歯
根をインブラントすることにより気孔５Ｂ内に繊維質組
織が侵入し、また気孔５Ｂ内に骨化が生じセメント質組
織を形成することができ、従って、天然歯根の歯根膜と
同様な作用を期待することができる。The inner surface of the recess, that is, the pore 5B is filled with bioactive material 4B.
is provided so as not to be in direct contact with the jawbone, so by implanting one artificial tooth root as in the embodiments shown in FIGS. 2a and 3a, fibrous tissue invades into the pores 5B. In addition, ossification can occur within the pores 5B to form a cementum tissue, and therefore, the same effect as the periodontal ligament of a natural tooth root can be expected.
〈発明の効果〉
本発明の人工歯根は、顎骨と接する部分に、多孔質を形
成する気孔を設けるように、生体不活性材料を配置し、
該気孔内に顎骨と直接接しないように生体活性材料を配
置するので、インブラントした際に、天然歯根における
歯根膜と同様な機構及び強度を有するように人工歯根を
顎骨内に埋め込むことができる。従って、緩衝材等を用
いなくても、咀噌時の顎骨への負荷を緩和することがで
きるので、顎骨内に長期にわたり安定的に存在させるこ
とができる。またインブラント後のメンテナンスも容易
である。<Effects of the Invention> In the artificial tooth root of the present invention, a bioinert material is arranged so as to provide pores forming porosity in the part that contacts the jawbone,
Since the bioactive material is placed within the pores so as not to be in direct contact with the jawbone, the artificial tooth root can be implanted into the jawbone so that it has the same mechanism and strength as the periodontal ligament of a natural tooth root when implanted. . Therefore, the load on the jawbone during mastication can be alleviated without using a cushioning material or the like, so that it can remain stably in the jawbone for a long period of time. Also, maintenance after implantation is easy.
第１図は人工歯根の概略斜視図、第２ａ図は人工歯根の
一部拡大断面図、第２ｂ図は人工歯根の一部拡大平面図
、第３ａ図は他の人工歯根の一部拡大断面図、第３ｂ図
は他の人工歯根の一部拡大平面図、第４ａ図は更に他の
人工歯根の一部拡大断面図、第４ｂ図は更に他の人工歯
根の一部拡大平面図である。
１・・人工歯根、２，２Ｂ・・芯材、２Ａ・・穴、３，
３Ａ、３Ｂ・・生体活性材料、４．４Ａ。
４Ｂ・・生体不活性材料、５，５Ｂ・・気孔。Fig. 1 is a schematic perspective view of the artificial tooth root, Fig. 2a is a partially enlarged sectional view of the artificial tooth root, Fig. 2b is a partially enlarged plan view of the artificial tooth root, and Fig. 3a is a partially enlarged sectional view of another artificial tooth root. Fig. 3b is a partially enlarged plan view of another artificial tooth root, Fig. 4a is a partially enlarged sectional view of another artificial tooth root, and Fig. 4b is a partially enlarged plan view of yet another artificial tooth root. . 1...Artificial tooth root, 2, 2B...core material, 2A...hole, 3,
3A, 3B...Bioactive material, 4.4A. 4B: bioinert material, 5,5B: pores.
Claims (1)
と、人工歯根の内側方向に向かって気孔を有し、且つ顎
骨と接するように配置した生体不活性材料と、前記気孔
内部に、直接顎骨と接しないように配置した生体活性材
料とを備えることを特徴とする人工歯根。 ２）前記気孔表面部の径が、１〜５０μｍ及び／又は３
００〜１０００μｍであることを特徴とする請求項１記
載の人工歯根。[Claims] 1) A core material having a hole for inserting and fixing the upper structure of the tooth, and a bioinert material having pores toward the inside of the artificial tooth root and arranged so as to be in contact with the jawbone. and a bioactive material placed inside the pore so as not to come into direct contact with the jawbone. 2) The diameter of the pore surface portion is 1 to 50 μm and/or 3
The artificial tooth root according to claim 1, having a diameter of 00 to 1000 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1124527A JPH02305569A (en) | 1989-05-19 | 1989-05-19 | Artificial root of tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1124527A JPH02305569A (en) | 1989-05-19 | 1989-05-19 | Artificial root of tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02305569A true JPH02305569A (en) | 1990-12-19 |
Family
ID=14887688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1124527A Pending JPH02305569A (en) | 1989-05-19 | 1989-05-19 | Artificial root of tooth |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02305569A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60185563A (en) * | 1984-03-05 | 1985-09-21 | 株式会社香蘭社 | Ceramic member for prosthesis |
-
1989
- 1989-05-19 JP JP1124527A patent/JPH02305569A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60185563A (en) * | 1984-03-05 | 1985-09-21 | 株式会社香蘭社 | Ceramic member for prosthesis |
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